HC Ch 8.1 Aqueous Reactions

Multiple Select

Which of the following is a driving force that favors chemical change?

• Formation of water

• Formation of a solid

• Transfer of electrons

• Formation of a gas

• Formation of a liquid

Multiple Choice

What is a reaction called in which a solid forms?

• Combustion reaction

• Precipitation reaction

• Decomposition reaction

• Synthesis reaction

Multiple Choice

What happens when an ionic compound dissolves in water?

• Oppositely charged ions combine to form a compound.

• The ions separate and move around independently.

• The ions evaporate.

• The ions become magnetic.

Multiple Choice

What happens when an ionic compound dissolves in water?

• It forms a gas.

• It forms a solid.

• It dissociates into ions.

• It remains unchanged.

Multiple Choice

Which ions are present in K₂CrO₄(aq)?

• K²⁺ and CrO₄⁻

• CrO₄²⁻ and Ba²⁺

• K⁺ and CrO₄²⁻

• Ba²⁺ and NO₃⁻

Multiple Choice

Which ions are present in Ba(NO₃)₂ (aq)?

• Ba²⁺ and NO₃⁻

• Ba⁺ and NO₃²⁻

• Ba²⁺ and NO₃²⁻

• Ba⁺ and NO₃⁻

Multiple Choice

What is the chemical formula for the compound formed by Ba²⁺ and CrO₄²⁻?

• BaCrO₄

• Ba₂(CrO₄)₂

• Ba₂CrO₄

• Ba(CrO₄)₂

Multiple Select

Which are possible combinations in this reaction?

• KNO₃

• K₂Ba

• BaCrO₄

• Ba(NO₃)₂

• (NO₃)₂CrO₄

Multiple Choice

What is the purpose of determining possible products from ions in reactants?

• To identify the color of the solution

• To decide what products form

• To measure the temperature change

• To calculate the pH level

Multiple Select

Which of the following salts are generally soluble in water at 25 °C?

(Rules 2 and 3)

• AgCl

• NaCl

• PbCl₂

• Hg₂Cl₂

• KCl

Multiple Choice

Which of the following sulfate salts is an exception to the general solubility rule?

(Rule 4)

• Na₂SO₄

• K₂SO₄

• BaSO₄

• (NH₄)₂SO₄

Multiple Choice

Which of the following compounds is only slightly soluble in water?

(Rule 5)

• NaOH

• KOH

• Ca(OH)₂

• Ba(OH)₂

• NH₄OH

Multiple Select

Which of the following salts are slightly soluble in water?

(Rule 6)

• Na₃PO₄

• K₂S

• NH₄NO₃

• CaCO₃

Multiple Select

The term "slightly soluble" really means...

(Choose 2)

• insoluble

• such a tiny amount dissolves it's impossible to see

• about half will dissolve, but half will not

• soluble

• forms a precipitate

Multiple Choice

Which will most likely be the precipitate when combining

• K₂CrO₄(aq) + Ba(NO₃)₂(aq)

• KNO₃

• BaCrO₄

• K₂Ba

• CrO₄(NO₃)₂

Multiple Choice

Which of the following ions form compounds with Pb²⁺ that are generally soluble in water?

• S²⁻

• Cl⁻

• NO₃⁻

• SO₄²⁻

• Na⁺

Multiple Choice

What is the first step in predicting precipitates when solutions of two ionic compounds are mixed?

• Use the solubility rules

• Write the reactants as they actually exist

• Exchange the anions of the added salts

• Consider the various solids that could form

Multiple Choice

How do you consider the various solids that could form?

• By heating the solution

• By exchanging the anions of the added salts

• By adding more water

• By measuring the temperature

Multiple Choice

What is the purpose of using solubility rules in predicting precipitates?

• To decide whether a solid forms

• To change the color of the solution

• To increase the temperature

• To dissolve the reactants

Multiple Choice

What does a molecular (formula) equation show?

• The complete formulas of all reactants and products

• Only the ions involved in the reaction

• The balanced chemical equation

• The energy change in the reaction

Multiple Choice

Which type of equation shows all electrolytes as ions?

• Molecular equation

• Complete ionic equation

• Net ionic equation

• Balanced equation

Multiple Choice

What is included in a net ionic equation?

• All reactants and products involved in the reaction

• Only the components directly involved in the reaction

• Spectator ions

• The energy change

Labelling

Label the correct molecular equation, complete ionic equation, and net ionic equation for the reaction between cobalt(II) chloride and sodium hydroxide.

Drag labels to their correct position on the image

molecular equation

complete iconic equation

net ionic equation